{"id":3692,"date":"2026-03-05T10:28:34","date_gmt":"2026-03-05T02:28:34","guid":{"rendered":"https:\/\/www.handashielding.com\/?p=3692"},"modified":"2026-03-05T10:28:54","modified_gmt":"2026-03-05T02:28:54","slug":"why-emi-shielding-performance-fails-with-canted-coil-springs","status":"publish","type":"post","link":"https:\/\/www.handashielding.com\/ko\/why-emi-shielding-performance-fail.html","title":{"rendered":"\uce94\ud2b8 \ucf54\uc77c \uc2a4\ud504\ub9c1\uc73c\ub85c EMI \ucc28\ud3d0 \uc131\ub2a5\uc774 \ub5a8\uc5b4\uc9c0\ub294 \uc774\uc720"},"content":{"rendered":"<p>Discover the engineering causes behind EMI shielding failure in canted coil springs\u2014including loss of deflection, inconsistent contact force, and material relaxation. Learn proven design strategies to maintain shielding effectiveness.<\/p>\n\n\n\n<p><a href=\"https:\/\/www.handashielding.com\/emi-shielding-springs-canted-coil-springs\/\">\uce94\ud2b8 \ucf54\uc77c \uc2a4\ud504\ub9c1<\/a> are widely used in EMI shielding applications\u2014from medical devices and aerospace connectors to semiconductor equipment and telecommunications infrastructure\u00a0<a href=\"https:\/\/www.handaspring.com\/understanding-loss-of-deflection-in-canted-coil-springs-engineering-causes-diagnostic-methods-and-proven-solutions-with-handa-expertise\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a>. Their unique angled coil geometry allows them to close design gaps where the skin effect would otherwise create electrical dipoles that break through the surrounding shielding material\u00a0<a href=\"https:\/\/ieeexplore.ieee.org\/document\/8611640\/references#references\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a>.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/www.handashielding.com\/wp-content\/uploads\/2023\/04\/Spring-contact-finger7.png\" alt=\"EMI SHIELDING canted coil spring\" class=\"wp-image-331\" srcset=\"https:\/\/www.handashielding.com\/wp-content\/uploads\/2023\/04\/Spring-contact-finger7.png 500w, https:\/\/www.handashielding.com\/wp-content\/uploads\/2023\/04\/Spring-contact-finger7-300x300.png 300w, https:\/\/www.handashielding.com\/wp-content\/uploads\/2023\/04\/Spring-contact-finger7-150x150.png 150w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/figure>\n\n\n\n<p>But what happens when shielding performance degrades?<\/p>\n\n\n\n<p>When an EMI gasket fails, the consequences can be severe: signal instability, electromagnetic leakage, certification failure, and system downtime&nbsp;<a href=\"https:\/\/www.handaspring.com\/understanding-loss-of-deflection-in-canted-coil-springs-engineering-causes-diagnostic-methods-and-proven-solutions-with-handa-expertise\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a>. Understanding&nbsp;<em>\uc65c<\/em>&nbsp;shielding performance fails is essential for engineers designing high-reliability systems.<\/p>\n\n\n\n<p>This article explores the root causes of EMI shielding failure in canted coil springs, the engineering mechanisms behind each failure mode, and proven strategies to ensure long-term shielding effectiveness.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">1. How Canted Coil Springs Provide EMI Shielding<\/h2>\n\n\n\n<p>Before examining failure modes, it&#8217;s important to understand how canted coil springs function as EMI shielding elements.<\/p>\n\n\n\n<p>Canted coil springs\u2014also called slanted coil springs or spiral spring EMI shielding rings\u2014are helical geometries whose ends are circularly joined to form a torus&nbsp;<a href=\"https:\/\/www.handaspring.com\/understanding-loss-of-deflection-in-canted-coil-springs-engineering-causes-diagnostic-methods-and-proven-solutions-with-handa-expertise\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><a href=\"https:\/\/ieeexplore.ieee.org\/document\/8611640\/references#references\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a>. When installed in a groove between mating surfaces, the spring creates multiple points of electrical contact along its length.<\/p>\n\n\n\n<p>The shielding mechanism works as follows:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Design gap closure<\/strong>: The spring physically bridges gaps between conductive surfaces, preventing the formation of electrical dipoles that would allow EMI penetration\u00a0<a href=\"https:\/\/ieeexplore.ieee.org\/document\/8611640\/references#references\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a>.<\/li>\n\n\n\n<li><strong>Electrical continuity<\/strong>: The metallic spring provides a low-impedance path for interfering signals to be conducted to ground.<\/li>\n\n\n\n<li><strong>Multi-point contact<\/strong>: Unlike flat gaskets, canted coil springs maintain contact at multiple discrete points, ensuring consistent shielding even with surface irregularities.<\/li>\n<\/ul>\n\n\n\n<p>For effective EMI shielding, the spring must maintain:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sufficient contact force against mating surfaces<\/li>\n\n\n\n<li>Electrical conductivity at each contact point<\/li>\n\n\n\n<li>Stable mechanical engagement over time<\/li>\n<\/ul>\n\n\n\n<p>When any of these conditions degrade, shielding performance suffers.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">2. Primary Causes of EMI Shielding Failure<\/h2>\n\n\n\n<p>Based on engineering analysis of canted coil spring failures, shielding degradation typically results from one or more of the following mechanisms:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2.1 Loss of Deflection (Insufficient Compression Stroke)<\/h3>\n\n\n\n<p><strong>What it is<\/strong>: Loss of deflection occurs when a canted coil spring cannot achieve the required compression stroke or exhibits reduced restoring force after compression&nbsp;<a href=\"https:\/\/www.handaspring.com\/understanding-loss-of-deflection-in-canted-coil-springs-engineering-causes-diagnostic-methods-and-proven-solutions-with-handa-expertise\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a>.<\/p>\n\n\n\n<p><strong>How it affects EMI shielding<\/strong>: When the spring loses deflection, it fails to maintain adequate contact force against mating surfaces. This creates gaps in the conductive path, allowing EMI leakage. In EMI spiral spring shielding rings, constant compression combined with temperature cycling can lead to shielding gaps appearing over time&nbsp;<a href=\"https:\/\/www.handaspring.com\/understanding-loss-of-deflection-in-canted-coil-springs-engineering-causes-diagnostic-methods-and-proven-solutions-with-handa-expertise\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a>.<\/p>\n\n\n\n<p><strong>\uc77c\ubc18\uc801\uc778 \uc99d\uc0c1<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Reduced EMI shielding effectiveness<\/li>\n\n\n\n<li>Intermittent electrical continuity<\/li>\n\n\n\n<li>Signal instability<\/li>\n\n\n\n<li>Certification test failures\u00a0<a href=\"https:\/\/www.handaspring.com\/understanding-loss-of-deflection-in-canted-coil-springs-engineering-causes-diagnostic-methods-and-proven-solutions-with-handa-expertise\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><\/li>\n<\/ul>\n\n\n\n<p><strong>Root causes<\/strong>:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Cause<\/th><th class=\"has-text-align-left\" data-align=\"left\">\uc124\uba85<\/th><\/tr><\/thead><tbody><tr><td><strong>\uacfc\ub3c4\ud55c \uc555\ucd95<\/strong><\/td><td>Compression exceeding 30% of free height pushes the spring beyond its elastic limit&nbsp;<a href=\"https:\/\/www.handaspring.com\/understanding-loss-of-deflection-in-canted-coil-springs-engineering-causes-diagnostic-methods-and-proven-solutions-with-handa-expertise\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><\/td><\/tr><tr><td><strong>\uba38\ud2f0\ub9ac\uc5bc \ud06c\ub9bd<\/strong><\/td><td>Gradual deformation under sustained load, especially at elevated temperatures&nbsp;<a href=\"https:\/\/www.handaspring.com\/why-do-canted-coil-springs-lose-contact-force-over-time.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><\/td><\/tr><tr><td><strong>Fatigue<\/strong><\/td><td>High-cycle repetition (10,000\u2013100,000 cycles) leads to gradual force reduction&nbsp;<a href=\"https:\/\/www.handaspring.com\/understanding-loss-of-deflection-in-canted-coil-springs-engineering-causes-diagnostic-methods-and-proven-solutions-with-handa-expertise\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><\/td><\/tr><tr><td><strong>\ubd80\uc801\uc808\ud55c \uadf8\ub8e8\ube0c \ud615\uc0c1<\/strong><\/td><td>Groove too narrow causes coil confinement; groove too deep prevents proper engagement&nbsp;<a href=\"https:\/\/www.handaspring.com\/understanding-loss-of-deflection-in-canted-coil-springs-engineering-causes-diagnostic-methods-and-proven-solutions-with-handa-expertise\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">2.2 Inconsistent Contact Force<\/h3>\n\n\n\n<p><strong>What it is<\/strong>: Contact force refers to the normal force exerted by the spring against mating conductive surfaces. When this force becomes inconsistent\u2014either over time or across different assemblies\u2014shielding performance becomes unpredictable&nbsp;<a href=\"https:\/\/www.handaspring.com\/inconsistent-contact-force-in-canted-coil-springs.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a>.<\/p>\n\n\n\n<p><strong>How it affects EMI shielding<\/strong>: For effective EMI gasketing, the spring must maintain stable, distributed contact pressure. Inconsistent force leads to:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Uneven current distribution<\/li>\n\n\n\n<li>Localized gaps in the conductive path<\/li>\n\n\n\n<li>Variable transfer impedance<\/li>\n\n\n\n<li>Unpredictable shielding effectiveness\u00a0<a href=\"https:\/\/www.handaspring.com\/inconsistent-contact-force-in-canted-coil-springs.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><\/li>\n<\/ul>\n\n\n\n<p><strong>Root causes<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Stress relaxation<\/strong>: Gradual loss of stored elastic energy under sustained compression\u00a0<a href=\"https:\/\/www.handaspring.com\/why-do-canted-coil-springs-lose-contact-force-over-time.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><\/li>\n\n\n\n<li><strong>\uba38\ud2f0\ub9ac\uc5bc \ud06c\ub9bd<\/strong>: Slow permanent deformation under constant load, particularly at elevated temperatures\u00a0<a href=\"https:\/\/www.handaspring.com\/why-do-canted-coil-springs-lose-contact-force-over-time.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><\/li>\n\n\n\n<li><strong>Manufacturing tolerances<\/strong>: Dimensional variations in wire diameter, coil pitch, or free height\u00a0<a href=\"https:\/\/www.handaspring.com\/inconsistent-contact-force-in-canted-coil-springs.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><\/li>\n\n\n\n<li><strong>Assembly-induced variability<\/strong>: Misaligned grooves, over-compression during installation\u00a0<a href=\"https:\/\/www.handaspring.com\/inconsistent-contact-force-in-canted-coil-springs.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2.3 Material Relaxation and Creep<\/h3>\n\n\n\n<p><strong>What it is<\/strong>: Stress relaxation and material creep are time-dependent phenomena where metals gradually lose stored elastic energy or deform permanently under sustained load&nbsp;<a href=\"https:\/\/www.handaspring.com\/why-do-canted-coil-springs-lose-contact-force-over-time.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><a href=\"https:\/\/www.handashielding.com\/de\/how-to-prevent-force-relaxation-in-canted-coil-springs\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>.<\/p>\n\n\n\n<p><strong>How it affects EMI shielding<\/strong>: For EMI applications, even a 10\u201320% drop in contact force can be enough to compromise electrical conductivity&nbsp;<a href=\"https:\/\/www.handashielding.com\/de\/how-to-prevent-force-relaxation-in-canted-coil-springs\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>. When the spring no longer exerts adequate pressure against mating surfaces, contact resistance increases and shielding effectiveness declines.<\/p>\n\n\n\n<p><strong>Temperature effects<\/strong>: Temperature dramatically accelerates both relaxation and creep. General guidelines show:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>100\u00b0C \uc774\ud558 \u2192 \ucd5c\uc18c\ud55c\uc758 \ud734\uc2dd<\/li>\n\n\n\n<li>100-150\u00b0C \u2192 \uc801\ub2f9\ud55c \uc774\uc644<\/li>\n\n\n\n<li>150\u00b0C \uc774\uc0c1 \u2192 \ube60\ub978 \ud798 \ubd95\uad34(\uc2a4\ud14c\uc778\ub9ac\uc2a4\uac15\uc758 \uacbd\uc6b0)\u00a0<a href=\"https:\/\/www.handashielding.com\/de\/how-to-prevent-force-relaxation-in-canted-coil-springs\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/li>\n<\/ul>\n\n\n\n<p><strong>Material comparison<\/strong>: Different alloys exhibit dramatically different relaxation behavior:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">\uc7ac\ub8cc<\/th><th class=\"has-text-align-left\" data-align=\"left\">Force Loss After 1000 Hours @150\u00b0C<\/th><\/tr><\/thead><tbody><tr><td>302 \uc2a4\ud14c\uc778\ub9ac\uc2a4 \uc2a4\ud2f8<\/td><td>20-30%&nbsp;<a href=\"https:\/\/www.handashielding.com\/de\/how-to-prevent-force-relaxation-in-canted-coil-springs\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/td><\/tr><tr><td>316 \uc2a4\ud14c\uc778\ub9ac\uc2a4 \uc2a4\ud2f8<\/td><td>15-25%&nbsp;<a href=\"https:\/\/www.handashielding.com\/de\/how-to-prevent-force-relaxation-in-canted-coil-springs\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/td><\/tr><tr><td>\ubca0\ub9b4\ub968 \uad6c\ub9ac<\/td><td>8-15%&nbsp;<a href=\"https:\/\/www.handashielding.com\/de\/how-to-prevent-force-relaxation-in-canted-coil-springs\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/td><\/tr><tr><td>\uc5d8\uae38\ub85c\uc774\u00ae<\/td><td>&lt;8%&nbsp;<a href=\"https:\/\/www.handashielding.com\/de\/how-to-prevent-force-relaxation-in-canted-coil-springs\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/td><\/tr><tr><td>\uc778\ucf54\ub12c X-750<\/td><td>&lt;5%&nbsp;<a href=\"https:\/\/www.handashielding.com\/de\/how-to-prevent-force-relaxation-in-canted-coil-springs\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/td><\/tr><tr><td>MP35N<\/td><td>&lt;5%&nbsp;<a href=\"https:\/\/www.handashielding.com\/de\/how-to-prevent-force-relaxation-in-canted-coil-springs\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">2.4 Electrical Contact Failure<\/h3>\n\n\n\n<p>For EMI shielding and grounding applications, a canted coil spring may fail electrically even if it remains mechanically intact&nbsp;<a href=\"https:\/\/www.handaspring.com\/common-canted-coil-spring-failures-and-how-to-prevent-them\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a>.<\/p>\n\n\n\n<p><strong>Root causes<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Oxidation of contact surfaces<\/strong>: Corrosion or oxidation creates insulating layers that increase contact resistance<\/li>\n\n\n\n<li><strong>Insufficient contact force<\/strong>: When force drops below a threshold, the spring cannot penetrate surface oxides<\/li>\n\n\n\n<li><strong>Contamination at contact points<\/strong>: Particulates or films at the contact interface<\/li>\n\n\n\n<li><strong>Fretting corrosion<\/strong>: Micro-motion at contact points can accelerate surface degradation\u00a0<a href=\"https:\/\/www.handaspring.com\/common-canted-coil-spring-failures-and-how-to-prevent-them\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2.5 Improper Groove Design<\/h3>\n\n\n\n<p>Groove geometry is often overlooked but critically affects EMI shielding performance. Improper groove design can cause shielding failure even with a perfectly manufactured spring&nbsp;<a href=\"https:\/\/www.handaspring.com\/understanding-loss-of-deflection-in-canted-coil-springs-engineering-causes-diagnostic-methods-and-proven-solutions-with-handa-expertise\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><a href=\"https:\/\/www.handaspring.com\/inconsistent-contact-force-in-canted-coil-springs.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a>.<\/p>\n\n\n\n<p><strong>Common groove design errors<\/strong>:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Error<\/th><th class=\"has-text-align-left\" data-align=\"left\">Effect<\/th><\/tr><\/thead><tbody><tr><td>Insufficient groove depth<\/td><td>Uneven coil engagement, localized overstress&nbsp;<a href=\"https:\/\/www.handaspring.com\/inconsistent-contact-force-in-canted-coil-springs.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><\/td><\/tr><tr><td>\uacfc\ub3c4\ud55c \ubc29\uc0ac\ud615 \uac04\uaca9<\/td><td>Coil rotation, unpredictable force distribution&nbsp;<a href=\"https:\/\/www.handaspring.com\/inconsistent-contact-force-in-canted-coil-springs.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><\/td><\/tr><tr><td>\ub0a0\uce74\ub85c\uc6b4 \ubaa8\uc11c\ub9ac<\/td><td>Coil damage, stress concentration&nbsp;<a href=\"https:\/\/www.handaspring.com\/inconsistent-contact-force-in-canted-coil-springs.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><\/td><\/tr><tr><td>Rough surface finish<\/td><td>Increased friction, uneven loading&nbsp;<a href=\"https:\/\/www.handaspring.com\/common-canted-coil-spring-failures-and-how-to-prevent-them\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><\/td><\/tr><tr><td>\ube44\ud3c9\ud589 \uce21\ubcbd<\/td><td>\uace0\ub974\uc9c0 \uc54a\uc740 \ubd80\ud558 \ubd84\uc0b0&nbsp;<a href=\"https:\/\/www.handashielding.com\/de\/how-to-prevent-force-relaxation-in-canted-coil-springs\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Poor groove design can reduce spring life by more than 40%&nbsp;<a href=\"https:\/\/www.handashielding.com\/de\/how-to-prevent-force-relaxation-in-canted-coil-springs\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">3. The Mechanical-to-Electrical Failure Chain<\/h2>\n\n\n\n<p>To visualize how mechanical degradation leads to EMI shielding failure, consider the following failure chain:<\/p>\n\n\n\n<p>Each stage in this chain represents an opportunity for intervention and prevention.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">4. Engineering Solutions to Maintain Shielding Performance<\/h2>\n\n\n\n<p>The good news: EMI shielding failure in canted coil springs is not random\u2014it is the direct result of identifiable engineering factors&nbsp;<a href=\"https:\/\/www.handaspring.com\/why-do-canted-coil-springs-lose-contact-force-over-time.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a>. By addressing these root causes, engineers can achieve stable, long-term shielding performance.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4.1 Select the Right Material<\/h3>\n\n\n\n<p>Material selection is the single most effective way to prevent force relaxation and maintain EMI shielding performance&nbsp;<a href=\"https:\/\/www.handashielding.com\/de\/how-to-prevent-force-relaxation-in-canted-coil-springs\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>.<\/p>\n\n\n\n<p><strong>Material selection guide for EMI applications<\/strong>:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Application Requirement<\/th><th class=\"has-text-align-left\" data-align=\"left\">Recommended Material<\/th><\/tr><\/thead><tbody><tr><td>High-cycle EMI shielding<\/td><td>\uc5d8\uae38\ub85c\uc774\u00ae&nbsp;<a href=\"https:\/\/www.handaspring.com\/understanding-loss-of-deflection-in-canted-coil-springs-engineering-causes-diagnostic-methods-and-proven-solutions-with-handa-expertise\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><\/td><\/tr><tr><td>High-temperature environments<\/td><td>Inconel X-750 \/ 718&nbsp;<a href=\"https:\/\/www.handaspring.com\/understanding-loss-of-deflection-in-canted-coil-springs-engineering-causes-diagnostic-methods-and-proven-solutions-with-handa-expertise\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><\/td><\/tr><tr><td>General EMI\/grounding<\/td><td>17-7PH&nbsp;<a href=\"https:\/\/www.handaspring.com\/understanding-loss-of-deflection-in-canted-coil-springs-engineering-causes-diagnostic-methods-and-proven-solutions-with-handa-expertise\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><\/td><\/tr><tr><td>\ubd80\uc2dd\uc131 \ud658\uacbd<\/td><td>316L \uc2a4\ud14c\uc778\ub9ac\uc2a4 \uc2a4\ud2f8&nbsp;<a href=\"https:\/\/www.handaspring.com\/understanding-loss-of-deflection-in-canted-coil-springs-engineering-causes-diagnostic-methods-and-proven-solutions-with-handa-expertise\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><\/td><\/tr><tr><td>High electrical conductivity<\/td><td>\ubca0\ub9b4\ub968 \uad6c\ub9ac&nbsp;<a href=\"https:\/\/www.handaspring.com\/inconsistent-contact-force-in-canted-coil-springs.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Upgrading material alone can improve force retention by up to 50%&nbsp;<a href=\"https:\/\/www.handashielding.com\/de\/how-to-prevent-force-relaxation-in-canted-coil-springs\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4.2 Optimize Groove Design<\/h3>\n\n\n\n<p>Proper groove geometry ensures uniform coil engagement and prevents localized stress&nbsp;<a href=\"https:\/\/www.handaspring.com\/understanding-loss-of-deflection-in-canted-coil-springs-engineering-causes-diagnostic-methods-and-proven-solutions-with-handa-expertise\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><a href=\"https:\/\/www.handashielding.com\/de\/how-to-prevent-force-relaxation-in-canted-coil-springs\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>.<\/p>\n\n\n\n<p><strong>Recommended groove design guidelines<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\uadf8\ub8e8\ube0c \uae4a\uc774 = \uc640\uc774\uc5b4 \uc9c1\uacbd \u00d7 0.85-0.95\u00a0<a href=\"https:\/\/www.handashielding.com\/de\/how-to-prevent-force-relaxation-in-canted-coil-springs\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/li>\n\n\n\n<li>\ubaa8\uc11c\ub9ac \ubc18\uacbd \u2265 0.2mm\u00a0<a href=\"https:\/\/www.handashielding.com\/de\/how-to-prevent-force-relaxation-in-canted-coil-springs\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/li>\n\n\n\n<li>\ubc29\uc0ac\ud615 \uac04\uaca9 \uc81c\uc5b4<\/li>\n\n\n\n<li>\ud3c9\ud589 \ud648 \ubcbd<\/li>\n\n\n\n<li>Smooth surface finish (Ra \u2264 0.8 \u03bcm)\u00a0<a href=\"https:\/\/www.handaspring.com\/common-canted-coil-spring-failures-and-how-to-prevent-them\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><\/li>\n<\/ul>\n\n\n\n<p><strong>Groove issue troubleshooting<\/strong>:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Issue<\/th><th class=\"has-text-align-left\" data-align=\"left\">Effect<\/th><th class=\"has-text-align-left\" data-align=\"left\">\uc194\ub8e8\uc158<\/th><\/tr><\/thead><tbody><tr><td>Too narrow<\/td><td>Coil confinement<\/td><td>Increase width&nbsp;<a href=\"https:\/\/www.handaspring.com\/understanding-loss-of-deflection-in-canted-coil-springs-engineering-causes-diagnostic-methods-and-proven-solutions-with-handa-expertise\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><\/td><\/tr><tr><td>Too deep<\/td><td>Limited stroke<\/td><td>Reduce depth&nbsp;<a href=\"https:\/\/www.handaspring.com\/understanding-loss-of-deflection-in-canted-coil-springs-engineering-causes-diagnostic-methods-and-proven-solutions-with-handa-expertise\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><\/td><\/tr><tr><td>Incorrect diameter<\/td><td>Unintended preload<\/td><td>Adjust tolerance&nbsp;<a href=\"https:\/\/www.handaspring.com\/understanding-loss-of-deflection-in-canted-coil-springs-engineering-causes-diagnostic-methods-and-proven-solutions-with-handa-expertise\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><\/td><\/tr><tr><td>\ub0a0\uce74\ub85c\uc6b4 \ubaa8\uc11c\ub9ac<\/td><td>Stress concentration<\/td><td>Add radius&nbsp;<a href=\"https:\/\/www.handaspring.com\/inconsistent-contact-force-in-canted-coil-springs.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">4.3 Control Operating Deflection<\/h3>\n\n\n\n<p>Canted coil springs are designed to operate within a specific deflection range. Exceeding this range can cause plastic deformation and permanent force loss&nbsp;<a href=\"https:\/\/www.handaspring.com\/why-do-canted-coil-springs-lose-contact-force-over-time.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><a href=\"https:\/\/www.handaspring.com\/common-canted-coil-spring-failures-and-how-to-prevent-them\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a>.<\/p>\n\n\n\n<p><strong>Design rules<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Keep working deflection within\u00a0<strong>20-30%<\/strong>\u00a0of free height\u00a0<a href=\"https:\/\/www.handaspring.com\/understanding-loss-of-deflection-in-canted-coil-springs-engineering-causes-diagnostic-methods-and-proven-solutions-with-handa-expertise\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><\/li>\n\n\n\n<li>Never exceed 80% of maximum compression\u00a0<a href=\"https:\/\/www.handaspring.com\/understanding-loss-of-deflection-in-canted-coil-springs-engineering-causes-diagnostic-methods-and-proven-solutions-with-handa-expertise\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><\/li>\n\n\n\n<li>Add mechanical stops to limit maximum compression\u00a0<a href=\"https:\/\/www.handaspring.com\/common-canted-coil-spring-failures-and-how-to-prevent-them\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><\/li>\n\n\n\n<li>Define initial preload and target force range, not just deflection\u00a0<a href=\"https:\/\/www.handashielding.com\/de\/how-to-prevent-force-relaxation-in-canted-coil-springs\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">4.4 Apply Conductive Platings<\/h3>\n\n\n\n<p>For EMI applications, surface treatments are often essential to maintain low contact resistance&nbsp;<a href=\"https:\/\/www.handaspring.com\/common-canted-coil-spring-failures-and-how-to-prevent-them\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a>.<\/p>\n\n\n\n<p><strong>Common platings for EMI shielding<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\uc2e4\ubc84<\/strong>: Highest conductivity, good oxidation resistance<\/li>\n\n\n\n<li><strong>\uace8\ub4dc<\/strong>: Excellent corrosion resistance, ideal for critical applications<\/li>\n\n\n\n<li><strong>Tin<\/strong>: Cost-effective, good for general use<\/li>\n\n\n\n<li><strong>\ub2c8\ucf08<\/strong>: Often used as an underlayer<\/li>\n<\/ul>\n\n\n\n<p>Platings serve multiple functions:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Prevent oxidation of contact surfaces<\/li>\n\n\n\n<li>Reduce contact resistance<\/li>\n\n\n\n<li>Ensure galvanic compatibility with mating materials<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">4.5 Validate with Testing<\/h3>\n\n\n\n<p>Professional validation ensures that springs will maintain shielding performance throughout their service life&nbsp;<a href=\"https:\/\/www.handaspring.com\/common-canted-coil-spring-failures-and-how-to-prevent-them\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a>.<\/p>\n\n\n\n<p><strong>Recommended tests for EMI applications<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\ud558\uc911-\ubcc0\ud615 \uace1\uc120 \uce21\uc815<\/li>\n\n\n\n<li>Permanent set testing<\/li>\n\n\n\n<li>Thermal aging tests<\/li>\n\n\n\n<li>High-cycle fatigue testing<\/li>\n\n\n\n<li>EMI shielding effectiveness tests\u00a0<a href=\"https:\/\/www.handaspring.com\/understanding-loss-of-deflection-in-canted-coil-springs-engineering-causes-diagnostic-methods-and-proven-solutions-with-handa-expertise\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">5. Comparison: Spring Types and EMI Suitability<\/h2>\n\n\n\n<p>Different spring types exhibit varying suitability for EMI shielding applications:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">\uc2a4\ud504\ub9c1 \uc720\ud615<\/th><th class=\"has-text-align-left\" data-align=\"left\">\ud3ec\uc2a4 \uc548\uc815\uc131<\/th><th class=\"has-text-align-left\" data-align=\"left\">\ud3b8\ud5a5 \ubc94\uc704<\/th><th class=\"has-text-align-left\" data-align=\"left\">\uc774\uc644 \uc800\ud56d<\/th><th class=\"has-text-align-left\" data-align=\"left\">EMI Suitability<\/th><\/tr><\/thead><tbody><tr><td>\uc555\ucd95 \uc2a4\ud504\ub9c1<\/td><td>\ub0ae\uc74c<\/td><td>\uc881\uc740<\/td><td>\ubcf4\ud1b5<\/td><td>Poor<\/td><\/tr><tr><td>\uc6e8\uc774\ube0c \uc2a4\ud504\ub9c1<\/td><td>\ubcf4\ud1b5<\/td><td>\ubcf4\ud1b5<\/td><td>\ubcf4\ud1b5<\/td><td>\uc81c\ud55c\uc801<\/td><\/tr><tr><td>\ub9ac\ud504 \uc2a4\ud504\ub9c1<\/td><td>\ubcf4\ud1b5<\/td><td>\uc81c\ud55c\uc801<\/td><td>\ubcf4\ud1b5<\/td><td>\uc81c\ud55c\uc801<\/td><\/tr><tr><td><strong>\uce94\ud2b8 \ucf54\uc77c \uc2a4\ud504\ub9c1<\/strong><\/td><td><strong>\ub192\uc74c<\/strong><\/td><td><strong>\uc640\uc774\ub4dc<\/strong><\/td><td><strong>\uc6b0\uc218<\/strong><\/td><td><strong>\uc6b0\uc218<\/strong>&nbsp;<a href=\"https:\/\/www.handashielding.com\/de\/how-to-prevent-force-relaxation-in-canted-coil-springs\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Properly engineered canted coil springs outperform traditional springs in long-term force stability\u2014a critical requirement for reliable EMI shielding&nbsp;<a href=\"https:\/\/www.handashielding.com\/de\/how-to-prevent-force-relaxation-in-canted-coil-springs\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">6. Case Study: Shielding Failure in Medical Devices<\/h2>\n\n\n\n<p><strong>Scenario<\/strong>: A medical device manufacturer experienced intermittent <a href=\"https:\/\/www.handashielding.com\/emi-shielding-springs-canted-coil-springs\/\">EMI \ucc28\ud3d0<\/a> failures during certification testing. After several weeks of operation, shielding effectiveness dropped below required levels.<\/p>\n\n\n\n<p><strong>\uc9c4\ub2e8<\/strong>: Analysis revealed that the canted coil springs in the device&#8217;s EMI gaskets had experienced&nbsp;<strong>loss of deflection<\/strong>&nbsp;due to&nbsp;<a href=\"https:\/\/www.handaspring.com\/understanding-loss-of-deflection-in-canted-coil-springs-engineering-causes-diagnostic-methods-and-proven-solutions-with-handa-expertise\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Constant compression during storage<\/li>\n\n\n\n<li>Temperature cycling during operation<\/li>\n\n\n\n<li>Material relaxation in standard stainless steel<\/li>\n<\/ul>\n\n\n\n<p><strong>\uc194\ub8e8\uc158<\/strong>: The manufacturer&nbsp;<a href=\"https:\/\/www.handaspring.com\/understanding-loss-of-deflection-in-canted-coil-springs-engineering-causes-diagnostic-methods-and-proven-solutions-with-handa-expertise\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Upgraded to Elgiloy\u00ae springs for better relaxation resistance<\/li>\n\n\n\n<li>Optimized groove geometry to ensure uniform load distribution<\/li>\n\n\n\n<li>Implemented controlled compression limits during assembly<\/li>\n<\/ul>\n\n\n\n<p><strong>\uacb0\uacfc<\/strong>: Shielding performance remained stable throughout the device&#8217;s service life, and certification tests passed consistently.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion: Preventing EMI Shielding Failure<\/h2>\n\n\n\n<p>EMI shielding failure in canted coil springs is not inevitable\u2014it is an engineering challenge with clear solutions&nbsp;<a href=\"https:\/\/www.handaspring.com\/why-do-canted-coil-springs-lose-contact-force-over-time.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a>.<\/p>\n\n\n\n<p>The primary contributors to shielding degradation include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Loss of deflection<\/strong>\u00a0from over-compression or fatigue\u00a0<a href=\"https:\/\/www.handaspring.com\/understanding-loss-of-deflection-in-canted-coil-springs-engineering-causes-diagnostic-methods-and-proven-solutions-with-handa-expertise\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><\/li>\n\n\n\n<li><strong>Inconsistent contact force<\/strong>\u00a0due to stress relaxation and creep\u00a0<a href=\"https:\/\/www.handaspring.com\/inconsistent-contact-force-in-canted-coil-springs.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><\/li>\n\n\n\n<li><strong>Material limitations<\/strong>\u00a0at elevated temperatures\u00a0<a href=\"https:\/\/www.handaspring.com\/why-do-canted-coil-springs-lose-contact-force-over-time.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><a href=\"https:\/\/www.handashielding.com\/de\/how-to-prevent-force-relaxation-in-canted-coil-springs\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/li>\n\n\n\n<li><strong>Improper groove design<\/strong>\u00a0causing uneven loading\u00a0<a href=\"https:\/\/www.handaspring.com\/understanding-loss-of-deflection-in-canted-coil-springs-engineering-causes-diagnostic-methods-and-proven-solutions-with-handa-expertise\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><a href=\"https:\/\/www.handaspring.com\/inconsistent-contact-force-in-canted-coil-springs.html\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><\/li>\n\n\n\n<li><strong>Electrical contact degradation<\/strong>\u00a0from oxidation or contamination\u00a0<a href=\"https:\/\/www.handaspring.com\/common-canted-coil-spring-failures-and-how-to-prevent-them\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\"><\/a><\/li>\n<\/ul>\n\n\n\n<p>\uc5d4\uc9c0\ub2c8\uc5b4\ub294 \uc801\uc808\ud55c \uc7ac\ub8cc \uc120\ud0dd, \uc815\ubc00\ud55c \ud648 \uc124\uacc4, \uc81c\uc5b4\ub41c \uc791\uc5c5 \ubc94\uc704, \uc804\ubb38\uc801\uc778 \uc81c\uc870 \uacf5\uc815\uc744 \uc801\uc6a9\ud568\uc73c\ub85c\uc368 \ub2e4\uc74c\uacfc \uac19\uc740 \uc131\uacfc\ub97c \ub2ec\uc131\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4:<\/p>\n\n\n\n<p>\u2705 Stable EMI shielding effectiveness<br>\u2705 Reliable electrical contact<br>\u2705 Consistent mechanical performance<br>\u2705 \uc11c\ube44\uc2a4 \uc218\uba85 \uc5f0\uc7a5<br>\u2705 \ud604\uc7a5 \uc7a5\uc560 \uac10\uc18c&nbsp;<a href=\"https:\/\/www.handashielding.com\/de\/how-to-prevent-force-relaxation-in-canted-coil-springs\/\" target=\"_blank\" rel=\"noreferrer noopener\"><\/a><\/p>\n\n\n\n<p>For high-reliability EMI applications in medical, aerospace, semiconductor, or telecommunications systems, canted coil springs\u2014when correctly specified and applied\u2014provide exceptional long-term shielding performance.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><a href=\"https:\/\/www.handashielding.com\/request-a-quote.html\">\uacac\uc801 \uc694\uccad\ud558\uae30<\/a><\/p>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>Discover the engineering causes behind EMI shielding failure in canted coil springs\u2014including loss of deflection, inconsistent contact force, and material relaxation. Learn proven design strategies to maintain shielding effectiveness. Canted coil springs are widely used in EMI shielding applications\u2014from medical devices and aerospace connectors to semiconductor equipment and telecommunications infrastructure\u00a0. Their unique angled coil geometry [&hellip;]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[2],"tags":[],"class_list":["post-3692","post","type-post","status-publish","format-standard","hentry","category-news"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.handashielding.com\/ko\/wp-json\/wp\/v2\/posts\/3692","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.handashielding.com\/ko\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.handashielding.com\/ko\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.handashielding.com\/ko\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.handashielding.com\/ko\/wp-json\/wp\/v2\/comments?post=3692"}],"version-history":[{"count":2,"href":"https:\/\/www.handashielding.com\/ko\/wp-json\/wp\/v2\/posts\/3692\/revisions"}],"predecessor-version":[{"id":3694,"href":"https:\/\/www.handashielding.com\/ko\/wp-json\/wp\/v2\/posts\/3692\/revisions\/3694"}],"wp:attachment":[{"href":"https:\/\/www.handashielding.com\/ko\/wp-json\/wp\/v2\/media?parent=3692"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.handashielding.com\/ko\/wp-json\/wp\/v2\/categories?post=3692"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.handashielding.com\/ko\/wp-json\/wp\/v2\/tags?post=3692"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}